Spray nozzle



Oct. 17, 1950 R, H, GODDARD f 2,526,220

SPRAY NozzLE# Filed July 18, 1947 NVENTO I R gfwdwmw@ gjm. www@ Patented Oct. 17, 1950 UNITED STATES PATENT OFFICE SPRAY NozzLE Application July 18, 1947, Serialy No. 761,801

This invention relates to nozzles for producing conical liquid sprays.

It is the general object of the invention to provide a nozzle which will produce a conical spray which is widely and uniformly diffused, instead of being closely concentrated in a limited cross section.

To the accomplishment of this general object,

a spray nozzle is provided which in the preferred form provides concentric annular hollow streams of liquid which are rotated in opposite directions a's they emerge from the nozzle.

yThe invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

Preferred forms of the invention are shown in the drawings, in which h Fig. 1 is a sectional side elevation of a preferred nozzle construction;

Fig. 2 is a perspective view of an annular partition and associated vanes shown in Fig. 1; and

Figs. 3 to` 8 inclusive are sectional side elevations showing modiiied constructions.

Referring to Fig. 1,' a spray nozzle is shown comprising an outer casing I having its end portion Illa contracted to provide a nozzle opening I I. A tube I2 is mounted within the casing I and in spaced relation thereto, and the open end I4 of the tube preferably terminates slightly inward of the nozzle opening II.

An annular partition I3 is mounted between the casing I0 and the tube I2 and is curved to approximately correspond to the curvature of the casing ,part Ia. Outer vanes I3 are mounted between the casing IIJ and the partition I6, and

inner vanes I9 are mounted between the partition I6 and the tube I2. The vanes I8 andIS are welded or brazed or otherwise secured to the parts I0, I2 and I6 and serve to hold these parts in xed spaced relation.

The vanes I8 and I9 are approximately axially disposed at their entering or left-hand portions as viewed in Fig. 1, but are reversely curved at their delivery portions. Inner and outer hollow liquid streams will thus be delivered through the nozzle opening II, these inner and outer streams will be rapidly rotated but in opposite directions. This results in effective intermingling of the two streams into a single conical spray of very uniform density and large cross section.

In the construction shown in Fig. 3, the partition 23 is similarly provided with outer vanes 2| and inner vanes 22, but the outer vanes are of substantially greater width than the inner vanes,

2 Claims. (Cl. 299-121) so that the partition is relatively nearer to the tube 23. A larger proportion of the liquid is thus delivered through the outer vanes, and the resultant spray will be correspondingly more dense in its outer portion.

In Fig. 4, a plurality of vanes are provided outside of a partition 3| `and the inner set of vanes is omitted. The inner tube 33 may be positioned by radial supports 34. This construction provides a non-rotating hollow stream within a rotating hollow stream, so that the resultant spray is more dense in its inner portion.

In Fig. 5, the outer set of vanes is connected to an outer partition member or sleeve 4 I, and the inner set of vanes 42 is connected to an inner partition or sleeve 43. The partitions 4I and 43 are spaced apart toprovide an annular cylindrical passage 46 through which a non-rotating stream of liquid may be projected between oppositely rotating outer and inner hollow streams. The inner tube 41 may be positioned by radial supports 48. This type of nozzle is found to produce a spray of very uniform density.

In the construction shown in Fig. 6, outer vanes 50 are mounted within the casing 5I and inner vanes 52 are mounted on the tube 53, while the annular partition member'is entirely omitted. The inner tube 53 is positioned by radial supports 56. This construction gives good results and is somewhat simpler than the construction shown in Fig. 1.

In Fig. 7 the construction is still further simpliiied by providing aneannular set of relatively short vanes 6I! mounted 'within the outer casing 6IV and substantially spaced from the inner tube 62, which innertube has'radial supports 63.

In the construction shown in Fig. 8, three concentricv partitions 10, 1I and 'I2 are mounted between the casing`14 andthe inner tube 15. Four sets of vanes 16, 11, 1B and 19 are provided in the annular passages between the outer casing, the inner tube'and the three concenrtic partitions, as clearly shown in Fig. 8. Furthermore, the delivery ends of the outer and inner partitions 10 and 12 are extended beyond the 4delivery opening of the nozzle and are outwardly and inwardly anged as shown, so that portions of the liquid stream are directed outwardly through the opening and inwardly through the opening 8|. Preferably, adjacent sets of the vanes 16 to 19 are oppositely curved.

By varying the spacing of the several partitions, the density of the resultant spray may be effectively controlled.

Having described a preferred form of the invention' and several modications thereof, it will be understood that the invention is not to be limited to the details herein disclosed, otherwise than as set forth in the claims,v but what is claimed is:

1. A spray nozzle comprising an open inner tube Iand a concentric encircling outer tube defining an annular liquid passage having an outlet end part, an annular partition mounted adjacent said outlet end part of said passage and extending lengthwise of said end part only and dividing said outlet end part of said annular passage into separated inner and outer passage portions, and a plurality of angularly disposed varies mounted in said inner passage portion and in said outer passage portion of said annular passage respectively and inside and outside of said annular partition, and the vanes in said inner and outer passage portions being oppositely inclined.

2. A spray nozzle comprising an open inner tube and a concentric encircling outer tube dening an annular liquid passage having an outlet end part, an annular partition mounted adjacent said outlet end part of said passage and extending lengthwise of said end part only and dividing said outlet end part of said annular passage into separated inner and outer passage 4 portions, and a plurality of angularly disposed vanes mounted in said inner passage portion and in said outer passage portion of said annular passage respectively and inside and outside of said annular partition, and the vanes in said inner and outer passage portions being oppositely inclined, and said annular partition being positioned substantially nearer said inner tube than said outer tube and thereby relatively increasing the capacity of said outer passage portion.

ESTHER C. GODDARD, Ezecutria: of the Last Will and Testament of Robert H. Goddard, Deceased.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS 

